Anomalous Thermomechanical Properties of a Self-propelled Colloidal Fluid

Abstract

We use numerical simulations to compute the equation of state of a suspension of spherical, self-propelled nanoparticles. We study in detail the effect of excluded volume interactions and confinement as a function of the system temperature, concentration and strength of the propulsion. We find a striking non-monotonic dependence of the pressure with the temperature, and provide simple scaling arguments to predict and explain the occurrence of such an anomalous behavior. We conclude the paper by explicitly showing how our results have an important implications for the effective forces exerted by fluids of self-propelled particles on passive, larger components.

References in corpus (8)

• Spontaneous motion in hierarchically assembled active matter
• Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
• Meso-scale turbulence in living fluids
• When are active Brownian particles and run-and-tumble particles equivalent? Consequences for motility-induced phase separation
• A continuum theory of phase separation kinetics for active Brownian particles
• Phase behaviour of active Brownian particles: The role of dimensionality
• Sedimentation, trapping, and rectification of dilute bacteria
• Self-propelled Janus particles in a ratchet: Numerical simulations

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• Inclusions, Boundaries and Disorder in Scalar Active Matter
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• Designing, Synthesizing and Modeling Active Fluids
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• Statistical Mechanics of Transport Processes in Active Fluids II: Equations of Hydrodynamics for Active Brownian Particles
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• Statistical mechanics of transport processes in active fluids: Equations of hydrodynamics
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